The innate immune response is the first line of pathogenic defense which can be mediated by pathogen-derived signals such as lipopolysaccharide (LPS) from gram negative bacteria or viral DNA which are recognized by toll-like receptors (TLRs).
This molecular dialogue begins with the exudation of flavonoids from the legume, which are recognized by the bacterium.
By contrast, TLR ligands and whole bacteria, which are widely recognized as inflammatory signals, were classified as such by this system.
Handled by Wuju Li Enterobacteriaceae are a family of gram-negative, rod-shaped, facultative anaerobic bacteria, which are mainly recognized for their ability to cause intestinal diseases [1].
Pam3CysSerLys4 (Pam3CSK4) is a synthetic triacylated lipopeptide that mimics the triacylated lipoprotein of mycobacteria and classical gram-positive bacteria, which can be recognized by TLR2/TLR1 heterodimers and induce the production and release of pro- and anti-inflammatory cytokines (IL-6, IL-12, TNF-α and IL-10), chemokines (IL-8) and interferon (IFN-γ) [ 25– 28].
The first model proposes that two formats of antigens, soluble proteins and intact C burnetii bacteria, are recognized by B cells through different routes, which is well documented by several studies [45], [46], [47], [48], [49], [50], [51].
LPS and products from Gram-positive bacteria are recognized by toll-like-receptors (TLRs) 4 and 2, respectively, both of which are expressed in the murine intestinal mucosa [11].
